Question
TDA 201 to non A survey organization conducted telephone interviews in December 2008 in which 1009 randomly selected adults in the US responded to
TDA 201 to non A survey organization conducted telephone interviews in December 2008 in which 1009 randomly selected adults in the US responded to the question: "At the present time, do you think television commercials are an effective way to promote a new product?" Of the 1009 adults surveyed, 676 responded "yes." In December 2007, 622 of 1020 randomly selected adults in the US had responded "yes" to the same question. Suppose a hypothesis test is carried out to test the hypothesis that the proportion who would respond "yes" to the question changed from Dec. 2007 to Dec. 2008. Compute the appropriate sample proportions and compute the test statistic for this test. (8 pts.)
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